Barium Fluoride is used in spectroscopic components. Barium Fluoride is often suitable for applications in the passive IR band (8 to 14 μm) and is often used as a viewport window for thermography. For an equivalent thickness the transmission extends approximately 1 micron further into the IR than Calcium Fluoride. The highest quality Barium Fluoride also has application as the fastest known scintillator material and is used in High Energy Physics Experiments.
Specifications
Transmission Range
0.15 to 12 μm
Reflection Loss
6.5% at 5 μm (2 surfaces)
Absorption Coefficient
3.2 x 10-4 cm-1 @ 6 microns
Refractive Index
1.45 at 5 μm
Melting Point
1386 °C
Hardness
Knoop 82 with 500g indenter
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